/*
 * Copyright 2021 Muii
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.gitee.muii.echarts.constant.string;

public class Sampling extends StringConstants {

    public static final String AVERAGE = "average";
    public static final String MAX = "max";
    public static final String MIN = "min";
    public static final String SUM = "sum";
    private static Sampling sampling;

    public static Sampling getInstance() {
        if (sampling == null) {
            sampling = new Sampling();
        }
        return sampling;
    }

    private Sampling() {
        this.add(AVERAGE);
        this.add(MAX);
        this.add(MIN);
        this.add(SUM);
    }

}
